luhn: fix lambda usage (see exercism#287)

behrtam · Jan 25, 2016 · c31cf1f · c31cf1f
1 parent 8dc1d9f
commit c31cf1f
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/luhn/example.py b/luhn/example.py
@@ -3,8 +3,9 @@ def __init__(self, number):
         self.number = number
 
     def addends(self):
+        def luhn_transform(n):
+            return (2 * n - 9) if (n > 4) else (2 * n)
         old_digits = [int(d) for d in str(self.number)]
-        luhn_transform = lambda n: (2 * n - 9) if (n > 4) else (2 * n)
         return [(luhn_transform(n) if (i % 2 == 0) else n)
                 for i, n in enumerate(old_digits, start=len(old_digits) % 2)]